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Pension, Retiree Medical and Savings Plans (Estimated Amounts to be Amortized from Accumulated Other Comprehensive Loss into Benefit Expense in 2012 for Pension and Retiree Medical Plans) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 29, 2012
U.S. [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Net loss $ 289
Prior service cost/(credit) 18
Total 307
International [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Net loss 68
Prior service cost/(credit) 1
Total 69
Retiree Medical Plan [Member]
 
Defined Benefit Plan Disclosure [Line Items]  
Net loss 1
Prior service cost/(credit) (22)
Total $ (21)